Anomalous hydrogen absorption on non-stoichiometric iron-carbon compound
Journal of Alloys and Compounds Volume 507 Issue 2
Page 547-550
published_at 2010-10-08
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| File | |
| Title ( eng ) |
Anomalous hydrogen absorption on non-stoichiometric iron-carbon compound
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| Creator |
Fujii Tatsuo
Ishida Wataru
Isobe Shigehito
Fuji Hironobu
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| Source Title |
Journal of Alloys and Compounds
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| Volume | 507 |
| Issue | 2 |
| Start Page | 547 |
| End Page | 550 |
| Abstract |
On the synthesis of nano-structural hydrogenated graphite by ball-milling under H-2 atmosphere, iron contamination was mingled from steel balls during ball-milling. It is clarified by spectroscopic measurements that the mingled iron formed a non-stoichiometric iron-carbon (Fe-C) compound. The Fe-C phase was transformed to a well-ordered phase with H-2 desorption at 450 degrees C, suggesting that the hydrogen atoms were anomalously trapped at the Fe-C phase. With respect to hydrogen absorbing properties, the mingled iron enhanced the hydrogen capacity by about 50% compared with iron free hydrogenated graphite, where H/Fe was about 13 mass%. Therefore, if the hydrogen absorption site originated in the Fe-C phase could be synthesized independently, it should be recognized as a promising hydrogen storage system.
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| Keywords |
Hydrogen absorbing materials
Amorphous materials
Mechanochemical processing
Mossbauer spectroscopy
X-ray and gamma-ray spectroscopies
Thermal analysis
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| NDC |
Chemistry [ 430 ]
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| Language |
eng
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| Resource Type | journal article |
| Publisher |
Elsevier Science SA
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| Date of Issued | 2010-10-08 |
| Rights |
Copyright (c) 2010 Elsevier B.V.
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| Publish Type | Author’s Original |
| Access Rights | open access |
| Source Identifier |
[ISSN] 0925-8388
[DOI] 10.1016/j.jallcom.2010.07.221
[NCID] AA10817249
[DOI] http://dx.doi.org/10.1016/j.jallcom.2010.07.221
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